Home / 1,320.87-1,818.74-1,173.25

Finding the Fourth Proportional to 1,320.87, 1,818.74 and 1,173.25

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Solution

The fourth proportional to 1,320.87, 1,818.74 and 1,173.25 is: 1,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.87 : 1,818.74 = 1,173.25 : x
  2. Step 2: Convert to fraction form
    1,320.87/1,818.74 = 1,173.25/x
  3. Step 3: Cross multiply
    1,320.87x = 1,818.74 × 1,173.25
  4. Step 4: Simplify right side
    1,320.87x = 2,133,826.29
  5. Step 5: Solve for x
    x = 2,133,826.29/1,320.87
  6. Step 6: Final answer
    x = 1,615.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.